Improvement in lumber-driers



' `corresponding parts of the kiln.

i w. w `c. sc

.o T-T, o F R 1 TC rr M Q N D, ;ND IA N A miare matura 90,027, ;zaraz May 11, 183g The Soheule refen'ed to lu these-,Letters Patent and making part ot thesame.

Toal'wlwm 'itma/come'rm. V Beit known that I, W`. O. SCOTT, of the city of- -Richmond, and State of Indiana, have invented a new 'and useful Improyement in 'Lumber-Kilns;` and 'I dov `hereby declare that the following` is a full, clear,'and

exact description thereof, reference being had to the accompanyingdrawings,making a part of this speci- `-fica'i '.ion,ii nwhichv Figure 1 is a'pei'spective view, showing the interior `of the building,and

Figure 2 is 'an end elevation'.

The same letters in the different fi'guresorelate to My invention relates to `a kiln, o r drying-house .for

y .lumbeiyin which is"placed suitable apparatus, consistf e ing of a furnace, with a considerable length of pipe leading from the Isame,and arranged horizontally in thelower part of the building, through which the products of combustion pass; also tanks containing water,

through one of whichthe products of combustion are passe for the double purpose of arresting sparks and carrying moisture from thewater inthe tank, which is discharged into' the building with the products of combustion, by whichthe lnmber is kept moistV or steamed during the process of drying. y

The object'of discharging the products 'of combusi .tion in the building, is to more completely utilize the `heat,'and.atthe same'timehydrate' the air'of the kiln by means :of the tank, as before stated.

important feature in my invention consists in the `usefiof the pipes (arranged as above described)for the purpose of fradatng, and thus utilizing a greater 'proportion of heatthan would otherwise be the case.

Another important object i'n the use' of the pipes, is

` tolincrease the draught of air through the building, which air is heated by the pipes, and pass'es through the lun'ibe'r, thus facilitating the drying of the latter. i. Suitable'openings are made in the lower part of the building, for the admissionof air.``

To enable others skilledin theart to make and use my invention, ;I will proceed to describe its construction and operation. y v' A represents a suitable building, in which the drying-apparatus is placed.` 4

a is the furnace, from which the products .of combustion pass through pipe binto `tank c,`and`from the latte'r', through pipe b', zintoa` receptacle, d, from which they escape into the building.

The twofold purpose of tank c is to arrest and extinguish sparks, and to supply moisture for steaming The object of receptacle d is also to extinguish sparks, should any escape from tank c and reach that point thronghthe pipe.

Tank c is supplied with water, the height of which is always less than the height of the endsof pipes b rand b'. y 4

Moisturefrom the evaporation the water in tank the tank.

serves to arrest and extinguish the sparksfrom the furnace.` I

' The different directions of the discharge and escape of the products of combustion, inV passing through tank 0, also aid iuarresting and extinguishing the sparks in' said tank. j i p The receptacle d is constructed to hold Water at the bottom. Itstop is a solid plate, e, and its sides,1near the top, are perforated or reticulated. i

Pipe bf entersreceptacle d, and, by means of an elbow, terminates in a Vertical position, at a short distauce beneath plate e. Thus the products of combnstion are discharged against said plate, and escape from;

the receptacle dinto the building, through the perfol'ations or reticulations at the sides'of Saidreceptacl'e,

the open capacity of which is equal to or greater than the capacity of'pipe b'.

Receptacle d thus efi`ectually destroys any Sparks'` that may escape from tank c,the sparks being precipitated by plate e, and extinguished by the water in the bottom of the receptacl, or prerented by the screen from escaping with the gases;

w The lumber to be dried is placed upon the crosstimbers w. 5

- At the fcommencement of the drying-proeess, tank w c is supplied With the maximum quantity of water, which is evaporated and carried through the pipes to the lnmber by the passing currents from the furnace,

thus supplying the necessary moisture for steaming the lumber. f 1

The quantity or depth of water in tank c is gradually lowered by evaporation, (and by being drawn ofl', if necessary,) to proportiouately diminish the quantity. of .moisture conveyed to the lumber as the process of ,drying advances, thus reducing the water, and stopi ping the moisture at a proper time to finish drying the lumber.

The water vintank c is not necessarily heated to the boiling-temperature by the passin'g products of 'com-` bustion, to insure successful operation of the kiln,

The degree to which the water in said tank is heated depends, to 'a considerable extent, onthe proximity of the surface of the water to the end of pipe b, through which the products of cqmbustion are discharged into The evaporation of the water iu tank c is sufiicient, however, to supply the necessary moisture to the lumber, to promote the process of drying `to the best 'ad; Vantage, by preventing the sap from becomingcoagulated, or, the surface of the lumber from i becomng hardened before the interior is properly dried. I

A ceiling or floor, u, is located in the upper part of the building, andis provided with apertures nat each corner, through which apertures the gases escape to the chimney, by which the upward draught is eqnalized throughout 'the interior of the building, and 1 the heat thus more equally diifused through the lumber.

J and J' are' air-ducts, admitting suflioient air to the interior of the building to supply the partialv vacuum vproduced by the heat from the furnace, thus increasand facilitating the through which water is supplied to ing, by which tank o is supplied with water, the top of feeder 'r being lower than theeends of pipes b and b', thus preventing the tank from being supplied with sutficient water to reach and interfere with the ends of said pipes. v I 1 t o, fig.- 2, are air-passages, by which air is admitted beneath the furnace, entering the latter near thel rear end, by. which the heat radiated beneath the furnace is economized, and'the combustion increased.

s is a slide for closing'the air-passages v, when desired.

g represents a damper, fox` regulating the draught .through the building, and is operated by means of a pulley with a oord suspended.

receptacle d, in the mann forth.

Also, the tank c, for the purp sparks and supplyin forth.

Also, the reoeptacle d, wi forated or reticulated sides, when arran tion to pipe b, in the mauner set forth.

W. C'. SCOTT.

ose of extinguishing g moisture to the lumber,as set ged, with rela- Witnesses:

J osuPH Bruce, SAML. F. Es'rELL.

I clairn, and desxre to secure by Letters Pat- With the building and furnace, the heat-radiating pipes, arranged in combination ,with tank c and ver and for the purpose set th its top plate e, and-pr- 

